What's eating my dunn's cape primrose?

Dunn's cape primrose, a monocarpic Streptocarpus houseplant, is most troubled by mealybugs sheltering in its large single leaf and vine weevil larvae attacking the roots. Aphids and fungus gnats can also occur, particularly in warm indoor conditions or where soil stays too wet.

White waxy cottony deposits along the midrib and base of the single large leaf; sticky honeydew and weakened growth Dab with alcohol-soaked cotton swab; spray with insecticidal soap or dilute neem oil; repeat every 7–10 days until clear

Creamy C-shaped larvae devour roots and the base of the tuber, causing sudden wilting and collapse Apply nematodes (Steinernema kraussei) to moist compost in spring or autumn; remove and destroy grubs found when repotting

Larvae feed on roots and organic matter in wet soil; seedlings or young plants may collapse Let soil surface dry between waterings; use Bti-based drench; sticky yellow traps to monitor adults